Practice question

MCQ

Question

Yolk sac route inoculation should be done on

Options

Choose one · Correct answer highlighted

6-8 days old fertile eggs Correct 10-12 days old fertile eggs 12-14 days old fertile eggs 14-16 days old

Explanation

Yolk sac inoculation targets rapidly dividing embryonic endoderm for growth of Chlamydia and some viruses. Optimal yolk sac size and embryo susceptibility occur in 6-8 days old embryonated eggs. Older eggs 10-14 days are preferred for allantoic or amniotic routes.

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